Cook the pasta according to package directions. Drain and rinse in cold water. Add cherry tomatoes, zucchini, cucumber, green and red bell pepper, red onion and olives in a large bowl.
To make the dressing: Whisk together italian salad dressing, parmesan cheese, sesame seeds, paprika, celery seed, and garlic powder. Pour over salad and toss until coated. Cover and refrigerate for 3 hours or overnight.